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Science:chap 4

QuestionAnswer
One of the elements of group 2 of the Periodic Table Alkaline Earth Metal
One of the metals that can use the inner shell before using the outer shell to bond Transition Metal
One of the unreactive elements of group 18 of the periodic table Noble Gas
One of the elements of group 17 of the periodic table; combine with most metals to form salt Halogen
Massless energy containing particle that electromagnetic waves sometimes behave like Photon
Particle in the nucleus with an electric charge of 1+ Proton
Particle with an electric charge of -1, surrounding the nucleus of an atom Electron
The small positively charged center of an atom, contains protons and neutrons Nucleus
Electrically neutral particle inside the nucleus of an atom Neutron
Number of protons in an atom nucleus Atomic Number
Sum of the number of protons and neutrons in an atom's nucleus Mass Number
Atom of an element that has a specific number of neutrons Isotope
SI unit for quantity equal to 6.022 x 10^23 units of that substance Mole
A region in an atom where there is a high probability of finding electrons Orbital
An electron that is found in the outermost shell of an atom and determines the atom's chemical properties Valence Electron
An arrangement of elements in order of their atomic numbers, such as elements with similar properties fall in the same groups Periodic Law
Unit of mass that describes the mass of an atom or molecule Unified Atomic Mass Unit
One of the elements of Group 1 of the periodic table Alkali Metal
Horizontal row in the periodic table Period
Vertical column in the periodic table Group
Charged particle that has either more or fewer electrons than protons Ion
Element that is shiny, malleable, ductile, and a good conductor of heat and electricity Metal
Element that usually is a gas or brittle solid at room temp. Not malleable or ductile Not a good conductor of heat or energy Nonmetal
Material that conducts an electric current under certain conditions Semiconductor
Created by: user-1980469
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